There is a very similar photo on page 197 of Bruce McCalley's Model T Ford book. The photo in the book has a 1915 touring and is said to be a "trick" photo. The guys (actually guy) in your photo and the one in the book could easily be the same.

Trick photo. You can see the overlap in the middle. There's many ways to do that depending on the camera format and developer. Today, it's even easier with digital photo editors as common as chewing gum.

Look at the window in the house in the background which appears just above the steering wheel. Notice it is not registered perfectly nor are the tree limbs and leaves in that same area. I have often reassembled "tiled" Ford drawings from the Benson Research Center and it is very difficult to scan a large print and then print it in 8-1/2 x 11 papers to then scan again and reassemble into the final print. You generally will have at least a few "fat" lines that didn't exactly register.

With the old box camera on a trypod the shutter was opened and closed manually the first opening and closing with the chap in the car, then the second opening and closing with him standing in front. then the film would be advanced. There is slight evidence of over exposure from the double opening. With a newer camera (60s) a bit trickier, take the photo, and rewind the film one frame and retake it a second time. I have done this for fun and it works.